Pseudo-Digital Qubits: A General Approach

TL;DR

This paper explores pseudo-digital coupling as a robust method to reduce errors in quantum dot quantum computers, extending the concept to superconducting qubits and simulations on silicon heterostructures.

Contribution

It generalizes the pseudo-digital approach beyond quantum dots to other qubit systems, including superconducting charge qubits, and provides simulation insights.

Findings

Pseudo-digital coupling reduces gating errors in quantum dot systems.

The approach can be adapted to superconducting charge qubits.

Simulations demonstrate the effectiveness of the generalized method.

Abstract

Pseudo-digital coupling has recently been proposed as a simple but robust technique for reducing gating errors in quantum dot quantum computers. Here, we discuss the technique in the context of simulations on silicon heterostructures. Additionally, we generalize and extend the pseudo-digital concept to other settings. In particular, we consider superconducting charge qubits and suggest a simple circuit for implementing dual, pseudo-digital working points.